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000000Ć1150Ć839 IOLMaster 11.02.2004
In rare cases, depending on the anatomical conditions of the measured
eye, it may occur that the signal produced by the pigmented epithelium
does not have the highest amplitude.
Fig. 52 Triple peak (double zoom)
RPE
ILM
choroid
In Fig. 52 the automatic peak detection system will find an axial length
value that is too short by approximately 0.15 Ć 0.35 mm. After
comparing all measured values and curves for this eye, the measuring
cursor must be moved manually to the middle (smaller RPE) peak
produced by the RPE. This measured value may be corrected (with
corresponding asterisk) or deleted.
Double peaks
In very rare cases it may occur that signals are produced by both the
pigmented epithelium and the choroid.
Fig. 53 Double peak produced by pigmented epithelium and choroid (double zoom)
RPE
choroid
In Fig. 53, the automatic peak detection system has placed the
measuring cursor in the correct position at the RPE and the measuring
cursor must not be shifted manually.
Note:
Such a curve may only be evaluated correctly by viewing all
measuring curves of this eye. Such a curve must be clearly distinĆ
guished from double peaks produced by the inner limiting
membrane and the RPE (see Fig. 50)! It may be necessary to delete
suspicious curves and take additional measurements (20 are
maximally possible per eye on one day).
Evaluation of ALM results
